HEIDENHAIN PWM 20 - Manual (Page 158)

November 2014 Checking incremental encoders 161
Pha
Phase-shift error of incremental signal 1 (A), incremental signal 2 (B)
If the incremental signal 1 is by 90° ahead of the incremental signal 2, one speaks of a 0° phase-
shift error (ideal case). Deviations from the optimum phase shift of 90° are indicated as phase-
shift error (in degrees).
TV1; TV2 Pha
0 180° / 180° = 1 : 1 0 Pha = 90°
Note
If the signals are ideal, the green pointer is at 0 position.
=ˆ =ˆ